Hello, Since Firefox updated itself to 50.1.0 I have been having a ton of issues with video playback in YouTube specifically. Every single video I play stutters / freezes all the time. - I have tested this on all sort of videos. High quality, low quality, long videos, short videos - It stutters everywhere if I use Firefox. - On other websites video playback work fine with no issues at all! - I have tried Internet Explorer and playback there is perfect! - No it is not my internet connection. - I am using Windows 7 and my video drivers are up to date. - I have tried installing Firefox 49.0.1 and Firefox 49.0.2. YouTube videos keep freezing. - Firefox with add-ons disabled - No difference - Refresh on Firefox - No difference - Hardware accelerate is off, making it on did not make any difference. - I understand that YouTube is using HTML5 instead of flash, but still I have disabled hardware accelerate on the flash player as well - No difference Can someone please help on this one?? I am so frustrated with this, that I have been using Internet Explorer for 2 weeks now, as much as I dislike it.. YouTube runs perfectly there. I have always been a Firefox user, but if I don't find a solution I will go somewhere else.